数值的整数次方

public class Solution { public double Power(double base, int exponent) { float res = 1; if (base == 0) { res = 0; } else if (exponent == 0) { res = 1; } else if (exponent > 0) { for (int i = 0; i < exponent; i++) { res *= base; } } else if (exponent < 0) { for (int i = 0; i > exponent; i--) { res /= base; } } return res; } }